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Mi-plinker's Review of Sylvan Arms AR-15 f/9mm Glock Conversion Block
It installs quickly and remains secured held in the lower. Worked flawlessly w fm9 upper and magpul mags. For now I’m sharing the lower w .300 Bo upper. So requires a spring and buffer hange as well, but for a day at the range the changeover is quite simple. This will be my home defense weapon.
Pros:
- Easy to install and remove though requires an Allen wrench
Cons:
- None
Best Used for:
- Multi caliber lower usage
- Sharing the lower with other uppers
Would Recommend:
Yes